False
Programming language with two main goals: confusing everyone with an obfuscated syntax, and designing as powerful a language as possible with a tiny implementation: this compiler executable is only 1024 bytes, written in pure 68000 assembler.
GAMIZETA
A superset of the BrainFuck programming language.
Iota and Jot
Iota is an unambiguous Turing-complete language with just two symbols, heavily utilizing the lambda calculus. Jot is an offspring of Iota that provides, among others, a particularly elegant Goedel numbering. This page also contains a four-line Iota implementation and a five-line Jot implementation in Scheme, and Javascript interpreters for the two languages.
Lesser-Known Programming Languages
Brief introductions to LITHP, C-, FIFTH, and other programming languages that have been overdue for a long time.
l33t
An esoteric language inspired by BF and Beatnik which allows l33t h4xX0r5 to write programs in their native dialect.
malbolge: "hello world"
The very first Malbolge program to appear, how it was crafted (by a genetic algorithm program) and similar things.
Malbolge: Programming from Hell
Specifically designed to be extremely difficult to program in.
nouse
A language in which the IP (instruction pointer) varies depending on the current stack size.
npiet
An interpreter for the piet programming language. In this language the programs are pictures, build out of 18 colors and black and white - this is about the real "art of programming".
Orthogonal
A programming language in which program flow can go sideways. Closely related to Befunge. Tutorial, reference, sample source code, Public Domain implementation available.
Owl (Obfuscated Weird Language)
By Antonio Maschio. A character-based language interpreter written in C, in the style of False.
P-nand-Q
Home of esoteric programming languages such as Java2K, Smith#, Sorted!, [], Esogotschi and the Great Python Language Zoo. Also heavy on the code obfuscation front.
Programming in Malbolge
Introduction to Malbolge programming. Also propose modificatins of Malbolge for making programming in it more worse.
Q-BAL Programming Language
A queue based programming language. It's not designed to be useful, just fun.
Shakespeare
A language with beautiful source code that resembled Shakespeare plays.
Turing Tarpit
Directory of sites dealing with obfuscated programming languages.
The Unlambda Programming Language
Minimalistic functional language based on the Lambda calculus but lacking the Lambda operator. Tutorial, reference, GPLed interpreters available.
Waduzitdo
Turing incomplete programming language written by a guy named Larry, who's friends always asked him about his new PC: "What does it do?" Works via 2 registers: accumulator and match flag which holds one value (T or F).
Weird Programming Languages
Yet another list of obfuscated programming languages.
Whitespace
Any non whitespace characters are ignored; only spaces, tabs and newlines are considered syntax.
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